diff --git a/index.html b/index.html
index b13e7c7..08cef88 100644
--- a/index.html
+++ b/index.html
@@ -58,6 +58,7 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
                             to make a new one. A new key won't be able to verify older signatures or vice versa.
                         </p>
                         <div class="btn btn-primary m-1" onclick="loadKeyFromLocalStorageWithUserFeedback()"><i class="fas fa-unlock"></i> Create/unlock private key</div>
+                        <div class="btn btn-primary m-1" onclick="unloadKey()"><i class="fas fa-lock"></i> Lock private key</div>
                         <div class="btn btn-primary m-1" onclick="exportPublicKey()"><i class="fas fa-file-export"></i> Export public key</div>
                         <br>
                         <div class="btn btn-danger m-1" onclick="exportPrivateKey()"><i class="fas fa-download"></i> Back up private key</div>
@@ -108,7 +109,7 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
                 <div class="btn btn-primary" onclick="openSettingsModal();"><i class="fas fa-cog"></i> Settings</div>
             </div>
         </div>
-        <div id="statustext" class="d-inline-block"></div>
+        <div class="d-inline-block"><span id="lockstatus" title="Private key locked"><i class="fas fa-lock"></i></span> <span id="statustext"></span></div>
         <div class="btn-toolbar" role="toolbar">
             <div class="btn-group me-2 mb-2" role="group" aria-label="First group">
                 <div class="btn btn-primary" onclick="pdfZoom('fitheight');"><i class="fas fa-arrows-alt-v"></i> Fit Height</div>
diff --git a/js/crypto.js b/js/crypto.js
index 16f31b8..f33088c 100644
--- a/js/crypto.js
+++ b/js/crypto.js
@@ -17,6 +17,7 @@ function loadKeyFromLocalStorage(callback) {
         callback("Key already loaded.", true);
         return;
     }
+    $("#lockstatus").css("display", "none");
     if (!inStorage("signingkey") || getStorage("signingkey") == "undefined") {
         var pass = prompt("Generating a new signing key (might take a while, be patient). Enter a password to protect it. You'll need to save this password somewhere safe; it cannot be recovered.");
         generatePrivateKey(getStorage("notary_name") + " <null@null.com>", pass, function (key) {
@@ -41,6 +42,11 @@ function loadKeyFromLocalStorage(callback) {
     }
 }
 
+function unloadKey() {
+    keymgr = undefined;
+    $("#lockstatus").css("display", "");
+}
+
 function loadKeyFromLocalStorageWithUserFeedback() {
     loadKeyFromLocalStorage(function (msg, ok) {
         if (ok) {
@@ -223,4 +229,17 @@ function importPrivateKey() {
             alert("Private key imported.");
         });
     }, ".asc");
-}
\ No newline at end of file
+}
+
+
+/**
+ * Show visual indicator when private key is not loaded/unlocked.
+ * @returns {undefined}
+ */
+setInterval(function () {
+    if (typeof keymgr == "undefined") {
+        $("#lockstatus").css("display", "");
+    } else {
+        $("#lockstatus").css("display", "none");
+    }
+}, 1000);
\ No newline at end of file